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;;; my-dired.el -- Extension for dired -*- lexical-binding: t -*-
;; Copyright (C) 2023 Free Software Foundation.
;; Author: Yuchen Pei <id@ypei.org>
;; Package-Requires: ((emacs "28.2"))
;; This file is part of dotfiles.
;; dotfiles is free software: you can redistribute it and/or modify it under
;; the terms of the GNU Affero General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; dotfiles is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General
;; Public License for more details.
;; You should have received a copy of the GNU Affero General Public
;; License along with dotfiles. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Extension for dired.
;;; Code:
(require 'my-utils)
(defvar my-dired-reverse-sorting nil)
(defun my-dired-find-or-alternate (arg)
"Find if file, alternate find if dir.
If prefix then xdg-open, dir or file."
(interactive "P")
(if arg (call-process "xdg-open" nil 0 nil (dired-get-filename nil t))
(if (file-directory-p (dired-get-filename nil t))
(dired-find-alternate-file)
(dired-find-file))))
(defun my-dired-do-rename-and-symlink-back (arg)
(interactive "P")
(dired-do-create-files 'move-and-symlink #'my-rename-and-symlink-back
"Move and symlink back" arg dired-keep-marker-rename
"Rename and symlink"))
(defun my-dired-sort-by-size ()
(interactive)
(setq dired-actual-switches
(concat dired-listing-switches " -S"
(when my-dired-reverse-sorting "r")))
(revert-buffer)
(setq mode-name "Dired by size"))
(defun my-dired-sort-by-time ()
(interactive)
(setq dired-actual-switches
(concat dired-listing-switches " -t"
(when my-dired-reverse-sorting "r")))
(revert-buffer)
(setq mode-name "Dired by time"))
(defun my-dired-sort-by-extension ()
(interactive)
(setq dired-actual-switches
;; FIXME: reverse sorting not working
(concat dired-listing-switches " -X"
(when my-dired-reverse-sorting "r")))
(revert-buffer)
(setq mode-name "Dired by extension"))
(defun my-dired-sort-by-name ()
(interactive)
(setq dired-actual-switches
(concat dired-listing-switches
(when my-dired-reverse-sorting " -r")))
(revert-buffer)
(setq mode-name "Dired by name"))
(defun my-dired-toggle-sorting (arg)
"Cycle dired sorting methods.
With a prefix arg, toggle `my-dired-reverse-sorting' instead."
(interactive "P")
(if arg
(progn
(setq my-dired-reverse-sorting
(not my-dired-reverse-sorting))
(cond ((equal mode-name "Dired by name")
(my-dired-sort-by-name))
((equal mode-name "Dired by time")
(my-dired-sort-by-time))
((equal mode-name "Dired by size")
(my-dired-sort-by-size))
((equal mode-name "Dired by extension")
(my-dired-sort-by-extension))))
(cond ((equal mode-name "Dired by name")
(my-dired-sort-by-time))
((equal mode-name "Dired by time")
(my-dired-sort-by-size))
((equal mode-name "Dired by size")
(my-dired-sort-by-extension))
((equal mode-name "Dired by extension")
(my-dired-sort-by-name)))))
(defun my-empty-xdg-trash ()
"Empty the xdg trash"
(interactive)
(let* ((xdg-data-dir
(directory-file-name
(expand-file-name "Trash"
(or (getenv "XDG_DATA_HOME")
"~/.local/share"))))
(trash-files-dir (expand-file-name "files" xdg-data-dir))
(trash-info-dir (expand-file-name "info" xdg-data-dir)))
(delete-directory trash-files-dir t)
(delete-directory trash-info-dir t)))
(defun my-dired-do-delete (delete-fun &optional arg)
"Wrapper of `dired-do-delete'.
With a prefix-arg, delete without moving to trash."
(interactive "P")
(if arg
(let ((delete-by-moving-to-trash nil))
(funcall delete-fun))
(funcall delete-fun))
)
(defun my-dired-do-rename (rename-fun &optional arg)
"Wrapper on `dired-do-rename'
With a prefix-arg, call it without using `vc-rename-file'."
(interactive "P")
(if arg
(let ((dired-vc-rename-file nil))
(funcall rename-fun))
(funcall rename-fun)))
(defun my-dired-display-file (_)
(dired-display-file))
(define-minor-mode my-dired-follow-mode
"Diplay file at point in dired after a move."
:lighter " dired-f"
:global t
:group 'dired
(if my-dired-follow-mode
(advice-add 'dired-next-line :after #'my-dired-display-file)
(advice-remove 'dired-next-line #'my-dired-display-file)))
(defun my-dired-rename-by-mtime-at-point ()
"Generates new file name based on mtime.
Format: yyyymmdd_hhmmss.ext"
(interactive)
(my-dired-rename-by-mtime (expand-file-name (dired-file-name-at-point))))
(defun my-dired-rename-by-mtime (file-name)
"Generates new file name based on mtime.
Format: yyyymmdd_hhmmss[_N].ext"
(let* ((ext (file-name-extension file-name))
(dir (file-name-directory file-name))
(new-file-name-base
(file-name-concat
dir
(concat
(format-time-string
"%Y%m%d_%H%M%S"
(file-attribute-modification-time (file-attributes file-name))))))
(new-file-name
(format "%s.%s" new-file-name-base ext))
(counter 0))
(unless (equal file-name new-file-name)
(while (file-exists-p new-file-name)
(setq counter (1+ counter)
new-file-name (format "%s_%d" new-file-name-base counter)))
(dired-rename-file file-name new-file-name nil))))
(defun my-dired-do-rename-by-mtime ()
"Generates new file name based on mtime.
Format: yyyymmdd_hhmmss_[N].ext"
(interactive)
(seq-do
'my-dired-rename-by-mtime
(dired-map-over-marks (dired-get-filename) nil)))
(provide 'my-dired)
;;; my-dired.el ends here
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